Journaling of supporting rollers



Peb.. 79 1928. ,658,530

J. glRNER JOURNALING OF SUPPORTING ROLLERS Filed July 22. 1922 LFQL fig.5. 51ML Patented Feb. 7, 1928.

O FFI CE JOSEF KIRNER, 0F STUTTGART, GERMANY.

JCUBNALING 0F SUPPORTING ROLLERS.

Application led July 22, 1922, Serial No. 576,819, vand iuGermany August22, 1921.

My invention has reference tothe mounting of supporting rollers forheavy rotary drums and the like, and it is int-ended to provide meansfor a better distribution of forces than heretofore accomplished, and togenerally improve the construction andarrangement of devices of the kindreferred to.

Supporting rollers employed for supporting heavy rotating drums, such asare used for instance for roasting, sifting, drying or mixing purposes,should be mounted in such a manner that the axes of the rollers and ofIthe drums are in parallel relation to each other. Unless this is donelateral thrusts f are set up between the supporting rollers and the drumwhich will either result in the pushing away of the parts or in a.straining of the contacting surfaces which are intended to prevent thispushing action.

There is the additional drawback resulting from the lateral Vthrust thatthe supporting surfaces at the roller and the drum are excessivelystrained by continuously ac ting dsliding motion, and are graduallyroughene The proper adjustment of the supporting rollers is difficult onaccount of the drums being frequently inaccessible at their front ends,and in view of their axes being partially inclined towards thehorizontal. It requires a succession of time-consuming trials to arriveat an exactly coaxial 'adjustment of the supporting rollers for thedrums. ln many cases, in which deformations are caused by irregularheating or varying load, it is not sufficient to have the adjustmenteffected once only. In the case of drums supported byseveral rollers,such as for instance, by'four or six rollers, the errors occurring inthe adjustment are not always easily noticeable, because the thrust ofone or several supporting rollers may be compensated by an approximatelyequal thrust of other rollers. The journaling as a whole in such casesappears to be in order, though there is an undesirably large4consumption of power set up in the overstrained bearings and anexcessive strain on the supporting surfaces.

In accordance with the invention about to- -be described the adjustmentof the supporting rollers is effected automatically by providing mea-nsof allowing the rollers to rock unt-il the proper position isautomatically reached in a plane tangential to the supporting rollers atthe point of support of the drum. By this means the necessity of thearrangement of special longitudinal bea-rings in the supporting rollersvis obviated, so as to insure reduction of frictional contact and adecrease of wear o-n the supporting surfaces.

In the drawings affixed to this specification and forming part thereof,the invention is shown by way of example as embodied in a drumsupporting device. In the vdrawings, Fig. 'l is an end view showing thelower part of the rotary drum and the supporting rollers. v

Fig. 2 is an axial section of a supporting roller and its bearings.

Fig. 3 illustrates in axial section a modified construction of thesliding and oscillating bearing for the supporting roller shown in planview.

Figs. 4 to 6 are sectional views of other modifications of supportingrollers in sectional planes parallel to the contacting surface of thesupporting roller and the drum.

Referring to the drawings, Fig. 1 shows the drum a as supported upon thesupporting rollers b which revolve in the inverse direction as the drum.VThe supporting rollers b are carried in supporting brackets or cradlesc which are notrigidly secured to the base plate (l, but are adapted tobe displaced upon this base plate for the purpose of effecting an exactadjustment by screws e. The supporting rollers b are moreover mounted oneither side in two blocks 71. or the like with open top andsubstantially similar to an open journal bearing, and which are movablein guides in the supports or cradles c, the guides being out of coaxialalinement, and forming an angle with each other, the apex of this angleis pointing in the direction of movement of the drum at the point ofcontact.

The supporting roller b itself or the axis of the same .is thereforefree after a few oscillations to finally assume the correct position ina plane formed by the cavities of the supports. If the drum a rotates ina truly circular path, the supporting rollers b will by themselvesassume the position in which the axes of the drums and of all 'of thesupporting rollers are in 'parallel relation to each other. If the drumshould direction either by chance or intentionally,

'displaced therein.

the supporting rollers in a short time will assume a more r lessinclined position so that their axes constitute the generatrices of arotation hyperboloid.

In the modification shown in Fig. 2 the supporting roller revolves ontwo roller bearings '1f and. about-a stationary pivot f the end faces ofwhich are provided Wit-h globularjournals g adapted to effect slightoscillations in the sliding blocks 11,. l- 1 The inodil'icationdisclosedin Fig. 3 differs from the one shown in Fig. 2 in that the globularjournals g are replaced by separate globular rings c.

In the modificationsv according to Figs. 4

Vand 5 the supporting roller Z) is rigidly secured to the,pivot f. Atthe ends of the pivotal stud or axle, f roller bearings 1' (Fig. 4) orball bearings r (Fig. 5) are mounted. 'Ihe outer ring races of theroller bearings in Fig. 4 have spherical circumferential faces and areseated in hollow spherically shaped blocks L, while in Fig. 5 theseblocks form the outer ring races for the balls.

In the structure illustrated in Fig. 6 roller bearings r2 are providedthe rollers of which have their outer surfaces shaped in such a mannerthat, when the rollers are seated upon the inner ring race, their` outersurfaces appear asbeing tangentially enveloped by an exterior sphere.Such rollers are not only adapted to revolve in cylindrically shapedouter races, but are also free to be The outer rings of the bearingsaccording to Fig. 6 may, therefore, be formed as ordinary smoothcylindrical rings, which are retained in the supports c. Various othermodifications and embodiments besidesthose herein before described byway of example are possible in my inrention which is applicable to agreat variety of uses, and is susceptible of changes and modificationsas will be required to suit the convenience of the user and Vto betteradapt the invention to the various arts and kinds of inachineryto whichit is applicable.

I claim:

1. Antifrictional support for rcvoluble drums and the like comprisingpairs of sup porting rollers, guides wherein both ends of the rolleraxles are free to move substantially in axial direction, the axes of thesaid guiding means extending in a .plane which is parallel to thetangent plane extending through the line of contact of said roller andsaid drum, the guiding means being so conlstructed that the axes of therollers on which l drums and the like comprising the drum bearswilLassnme a parallel relationship to the axis of the drum upon saidaxial movement.

2. Ant-ifrictional support for revoluble drums and the like comprisingpairs of supporting rollers, guides wherein both ends 3. VAntifrietionalsupport for revoluble x,

irs of supporting rollers, guides wherein th ends of the roller axlesare free to move substantially in axial direction, the axes of the saidguiding means extending in a plane which is parallel to the tangentplane extending through the line of contact of said roller and saiddrum, and a block and revoluble anti- `frictional bodies insertedbetween each axle end and said guiding means.

4f. Means for supporting a rotary drum comprising a pair of supportingrollers, the axles of which rollers are movably carried in guideways atoppositesides of said rollers, the axes of said guideways extending atanangle to each other and in a plane which extends in parallel to a planewhich is tangential to said rollers and said drum along the line whereeach roller engages said drum.

5. Means for supporting a rotar comprising a pairof supporting rol ers,the axles of which rollers are movably carried in guideways at oppositesides of said rollers, the axes of said guideways extending at an angleto each other, the vertex of said angle extending in the direction inwhich said drum ,is rotating, related to the line of engagement betweensaid drum and cach roller, said axes being in a plane which extends inparallel to a plane which is tangential to said rollers and said drumalong the line V'where-each roller engages said drum.

6. Means for supporting a rotary drum comprising a pair of supportingrrollers, thc axles of which rollers are nlovably carried in blocks ofguideways through tht` medium of rotary parts, the axes of said gudewaysextending in a plane which extends in parallel to a plane which istangential to said rollers and said drum along the line where cachroller engages said drum.

In testimony whereof I aiiix my signature.

JOSEF KIRNER.

drum 1

